Finishing tool for tubular stereotype plates



Sept. 19, 1933- H J w 1,927,712

FINISHING TOOL FOR TUBULAR STEREOTYPE PLATES Filed April 4, 1931 Patented Sept. 19, 1933 UNITED STATES .PAT rff eiesies FINISHING TOOL FOR TUBULAR STEREO- TYPE PLATES Herbert James Lowe, Galesburg, 111.

Application April 4, 1931. Serial No. 527,808

1 Claim. (01. 29-21) This invention relates to a finishing tool for A plate 5 is attached to one face of the collar shaping the edges of tubular stereotype plates and extends acrossone end of a dovetail groove whereby they can be held down to an interme- 6 formed in the periphery of said collar parallel diate portion of a cylinder. Tubular stereotype with the axisof rotation of the collar. A screw plates as now produced have no means whereby 7 is swiveled in the plate 5 and is provided at one 60 the abutting edges of two plates, such as used end with a head 8 of any suitable construction when running double pages, can be fastened to whereby it can be rotated readily. This screw the cylinder. Ordinarily the pressman has the projects into and engages a screw-threaded bore plates delivered to him with the ends merely. 9 formed in 'aslide 10 which fits snugly in groove abutting. Consequently as there is nothing to 6. That end of the slide remote from plate 5 6 hold these meeting ends to the cylinder they s n u a p nin or s t 11 t Wa f frequently spring outwardly and cause considwhich-carries a set screw 12.

erable noise by continual slapping upon the cyl- The bit or cutting tool of the device includes inder as they rapidly rotate during the printa shank 13 angular in cross section and adapt- 15 ing operation. ed to fit snugly in socket 11. This shank can be It is an object of the present invention to proadjusted longitudinally of the socket and held vide a tool whereby the ends of the tubular securely by the set screw 12. stereotype plates can be shaped to receive a fas- At the. Outer end of the Shank is a head 14 tening means for keying them to the cylinder. having three cutting edges indicated at 15, 16

' It is a further object to provide a novel means and. 17 respectively. Allof these cutting edges for holding the plates to a cylinder. 7 lie in the same plane. The cutting edge 15 is With the foregoing and other objects in view perpendicular to the longitudinal axis of'shank which will appear as the description proceeds, 3. T e Cutting edge 16 iS Parallel With Said the invention resides in the combination and araxis and at right angles o the ed e 5, e

rangement of parts and in the details of con- W ed Coming together to form a ri 0 struction hereinafter described and claimed, it ang e a ShOWh- The ed e 7 is ihe dat an being understood that changes in the precise acute angle re a ve to e ed 16;

embodiment of the invention herein disclosed, After th s tool has been secu ed on t e s af may be made within the scope of what is claimed, 0f the finisher h tubule! Stereotype plate is .30 without departing from the spirit of the invenrotated a the 11001 gTad-ilelly d theTeihtO- 35 tion. This will cause the edges l6 and 1'7 to form a In the accompanying drawing, the preferred p groove G in the plate P While e e d form of the invention has been shown. of the plate will bev squared by the other cut- In said drawing: ting edge 15. The other tubular stereotype 35 Figure 1 is a front elevation of the tool conplate is similarly finished so that when the stituting the present invention. grooved edges of the plates are brought together Figure 2 is a section on line 2--2, Figure 1, on a cylinder C, as shown in Figure 6, an inthe bit being shown in engagement with a porterior annular dovetail groove will be provided tion of a tubular stereotype plate. in which will be seated a dovetail key or clamp 40 Figure 3 is a plan view of the bit. 18 carried by the cylinder. This clamp can be m Figure 4 is an end elevation thereof. in the form of a split ring or an arcuate strip Figure 5 is a section on line 55, Figure 4. suitably fastened to the cylinder. Obviously with Figure 6 is a section through a portion of a the meeting ends of the plates thus held they r cylinder and of two abutting stereotype plates cannot spring nor can they slap upon the cylinheld to the cylinder by a clamp or key. der.

Referring to the figures by characters of ref- It is intended to bevel the'outer ends of the erence, 1 designates a collar which is adapted to plates and fasten them to the cylinder by means be placed on the boring shaft of the usual tubuof the usual clamps. r0 lar stereotype plate finisher and it is held to While this invention has been shown and dethis shaft by a set screw 2 bearing against a scribed for use with tubular or cylindrical plates block 3 adapted to engage the shaft. This block it is to be understood that-it can also be emmay be held against displacement when the tool ployed in the mounting of semiecylindrical is off of the shaft by a loose pin 4 extending plates or plates of other curvatures used in ro- 55 thereinto from the collar. tary presswork. V

bit for squaring and grooving the end of a retating tubular stereotype plate, said tool including a shank fastened in the socket, and a head on the shank having a cutting point with cutting edges converging thereto away from the shank andanother cutting edge perpendicular to one of the diverging edges and to the longitudinal center of the shank.

HERBERT JAMES LOWE. 

